Browsing Geophysical Institute by Title
Now showing items 852-871 of 903
-
Validation of boundary layer parameterization schemes in the Weather Research and Forecasting Model (WRF) under the aspect of offshore wind energy applications - Part II: Boundary layer height and atmospheric stability
(Peer reviewed; Journal article, 2015-07)Five different planetary boundary layer (PBL) schemes in the Weather Research and Forecasting (WRF) model have been tested with respect to their capability to model boundary layer parameters relevant for offshore wind ... -
Variability along the Atlantic water pathway in the forced Norwegian Earth System Model
(Peer reviewed; Journal article, 2018-03-27)The growing attention on mechanisms that can provide predictability on interannual-to-decadal time scales, makes it necessary to identify how well climate models represent such mechanisms. In this study we use a high (0.25° ... -
Variability and decadal trends in the Isfjorden (Svalbard) ocean climate and circulation – An indicator for climate change in the European Arctic
(Journal article; Peer reviewed, 2020)Isfjorden, a broad Arctic fjord in western Spitsbergen, has shown significant changes in hydrography and inflow of Atlantic Water (AW) the last decades that only recently have been observed in the Arctic Ocean north of ... -
Variability and mixing of the Filchner overflow plume on the continental slope,Weddell Sea
(Peer reviewed; Journal article, 2019-01)A large fraction of Antarctic Bottom Water is produced in the Weddell Sea, through mixing between the cold and dense shelf water masses and the warm and saline off-shelf water. We present observations of the dense Filchner ... -
Variability at Ocean Weather Station M in the Norwegian Sea
(Conference object, 2003)Time series of temperature and salinity from Ocean Weather Station M are analysed for periodic cycles of interannual to decadal scale. Time evolutions of the spectra show various spectral peaks at all depths, but none of ... -
Variability in deep water mass properties and mixing in the Norwegian Sea
(Master thesis, 2016-12-19)Decadal variations of the Norwegian Sea Deep Water are presented for the 1990s and 2000s. While salinity values have only slightly increased for the Norwegian Basin, there is a noticeable increase in potential temperature ... -
Variability in hydrochemical properties and composition of the dense water in the Faroese Channels
(Master thesis, 2018-06-21)The temporal variability in deep water properties and composition in both Faroe-Shetland and Faroe Bank Channel were examined in June 2002, July 2009, and April 2015. Differences in the water column structure and property ... -
Variability in the Geostrophic Flow of the Agulhas Current, an Investigation of Sea Surface Height Obtained from Altimetry Data
(Master thesis, 2015-06-15)The distinct and robust structure of the greater Agulhas Current regime southeast of southern Africa was depicted in the spatial pattern of the absolute dynamic topography. As a part of Work Package 3: Environmental driver, ... -
Variations of Mixed Layer Depth and Water Properties in the Norwegian Sea for the period 1949-1999
(Peer reviewed; Journal article, 2006-06-08)The mixed layer of the ocean and the processes therein affect the ocean’s biological production, the exchanges with the atmosphere, and the water modification processes important in a climate change per- spective. To provide ... -
Vertical diffusivity and oxygen concentrations in a fjord basin - A case study of the deep basin in Masfjorden
(Master thesis, 2021-06-01)The basin layer in a sill fjord is isolated from the coast, and may become hypoxic or anoxic if the renewal frequency is low. Deep water renewals and vertical mixing are the physical processes which affects the oxygen ... -
Vertical fluxes of nitrate in the seasonal nitracline of the Atlantic sector of the Arctic Ocean
(Peer reviewed; Journal article, 2016-07)This study compiles colocated oceanic observations of high-resolution vertical profiles of nitrate concentration and turbulent microstructure around the Svalbard shelf slope, covering both the permanently ice-free Fram ... -
Vertical mixing in the Arctic Ocean inferred from eXpendable Current Profilers
(Master thesis, 2011-05-31)Recent and historical data sets from different regions of the Arctic Ocean are analysed using velocity profiles from 127 eXpendable Current Profiler (XCP) deployments from the time period 1993 to 2010. The data sets are ... -
Vertical mixing in the marginal ice zone of the Barents Sea Spatial and temporal variation of oceanic turbulence - observations and numerical model experiments
(Doctoral thesis, 2007-01-12)Vertical mixing affects water mass modification, biological productivity, and chemical fluxes in the ocean, but its response to forcing and variability in time and space in seasonally ice-covered seas is inadequately known. ... -
Vertical structure and seasonal variability of the inflow to the Lofoten Basin inferred from high resolution Lagrangian simulations
(Peer reviewed; Journal article, 2019-11-13)The Lofoten Basin in the eastern Nordic Seas plays a central role in modifying the warm Atlantic Water inflow toward the Arctic Ocean. Here, the Atlantic Water experiences increased residence times, cooling, and substantial ... -
Vertical structure of recent arctic warming from observed data and reanalysis products
(Peer reviewed; Journal article, 2012-03)Spatiotemporal patterns of recent (1979–2008) air temperature trends are evaluated using three reanalysis datasets and radiosonde data. Our analysis demonstrates large discrepancies between the reanalysis datasets, possibly ... -
Vêrskipstasjonen MIKE og modellen MICOM - ei samanlikning av observasjonar og modellresultat over 55 år
(Master thesis, 2006)Observasjonar frå MIKE viser ein varm og salt periode som starta i år 2000, og i 2004 vart dei høgste, observerte temperatur og salt verdiane for den atlantiske kjernen registrert her. Oppvarminga nede i djupet pågår stadig, ... -
A view on possible regime shifts in the North Atlantic subpolar gyre in the mid 1920s and 1990s
(Master thesis, 2014-10-22)There is strong observational support for two significant warming episodes of the North Atlantic Subpolar Gyre (SPG), one starting in the mid 1920s the other in the mid 1990s. Possible mechanisms responsible for the two ... -
Volume transport and mixing of the cold water overflow downstream of the Faroe Bank Channel from one year of moored measurements
(Peer reviewed; Journal article, 2016-03-15)One-year long time series of current velocity and temperature from eight moorings deployed in the Faroe Bank Channel (FBC) are analysed to describe the structure and variability of the dense overflow plume on daily to ... -
Vortex interaction in the wake of a two- and three-bladed wind turbine
(Journal article; Peer reviewed, 2020)The vortex interaction in the wake behind a two- and three-bladed model scale wind turbine is investigated. The two rotors have equal solidity, and produce similar power and thrust at the design tip speed ratio. Phase-averaged ... -
Warm Atlantic water explains observed sea ice melt rates north of Svalbard
(Journal article; Peer reviewed, 2020)Warm Atlantic water (AW) that flows northward along the Svalbard west coast is thought to transport enough heat to melt regional Arctic sea ice effectively. Despite this common assumption, quantitative requirements necessary ...